Propertysheet Handler Appwizard

Property Sheet Wizard is a Visual C++ 4.0 AppWizard (it won't work with 5.0 for some reason...I havn't tested it with 6.0 though) that creates a shell extension DLL that adds another property page to the Properties dialog, as shown on the left. (Right-click on a file and choose Properties to display this dialog). The DLL supports self registration, that is you can register it with regsvr32.

To use this AppWizard, first it needs to be copied to your \BIN\IDE directory (for example mine is C:\MSDEV\BIN\IDE), then it will be displayed in the New Project dialog in Visual C++. Choose it to create a new property sheet file handler.

There are no steps to the AppWizard, it just creates a generic shell extension DLL.

For some reason, the .DEF file does not get added, so you will need to add PROPSHEET.DEF to your project before compiling. Also make sure to use uuidgen to generate a new CLSID for the DLL in Properties.h when developing your own shell extensions.

By default, the AppWizard creates a handler for a folder. Change the parameter to AddSymbol in CProperties::CPropertiesFactory::UpdateRegistry() in Properties.cpp to the alais for the file type:

BOOL CProperties::CPropertiesFactory::UpdateRegistry(BOOL bRegister)
	CRegisterClass reg(m_clsid, "Bitmap.Properties");

	VERIFY(reg.AddSymbol("bmpfile") == 3);   // Zero based... really %4
	reg.AddEntry("CLSID\\%1\\InProcServer32", "Apartment", 
In the example above we are making a handler for bitmaps, assuming the alias for bmp files is "bmpfile". Note that is it not the filenames extension. Look in HKEY_CLASSES_ROOT\. to figure out the alais of a specific filename extension. When developing your own handlers, make sure to change "PropSheet.Properties" to something more approiate.

I did not include an example with this project because it is very easy to make. Just create a new project using the AppWizard, compile and register it. (Register DLLs by running regsvr32 or choosing Register Control from the Tools menu when the project is loaded in Visual C++). Then right-click on any folder on your hard disk and choose Properties. Something similar to this should appear.

This code was originally taken from Visual C++ 4.0 How-To, a very useful book by Scott Stanfield and Ralph Arversen. I wrapped it up into a nice AppWizard and made it generic (it used to display subfolders there sizes of the selected folder).

Download source - 52.3 KB

This article was originally published on February 1st, 1999
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